Method for producing alloy powders based on titanium metal
a technology of titanium metal and alloy powder, which is applied in the field of powder metallurgy, can solve the problems of high brittleness and strength, difficult for the reducing metal to penetrate into the reaction zone, and the additional operation of producing powders
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example 1
[0244]2000 1 of filtered TiOCl2 solution with TiO2 concentration of 100 g / l and Ti3+0.5 g / l content with a temperature of 40° C. is fed into the hydrolysis reactor, where it is heated up to 90° C. within 10 minutes. After that, the solution is heated for 10 minutes to a boiling point of 103° C. and boiled for 3 hours, the pressure in the hydrolysis reactor is kept at the range of 0.09-0.11 MPa. The vapors of hydrochloric acid evolved during this process are removed from the hydrolysis reactor through a heat exchanger irrigated with chilled water having a temperature of +7° C., where the condensation of hydrochloric acid with 35% HCl content takes place. The hydrochloric acid solution is continuously withdrawn from the refrigerator and collected in a separate collecting tank. Subsequently, hydrochloric acid can be used to obtain a TiOCl2 solution or for neutralization after reduction at the next stages of the process. The yield of precipitation of titanium oxides and hydroxides expre...
example 2
[0252]The same procedure and sequence of actions are used as in example 1, except for the hydrolysis stage, which is described below. 2000 1 of filtered TiOCl2 solution with TiO2 concentration of 100 g / l and Ti3+ 0.5 g / l content with a temperature of 40° C. is fed into a 100 1 hydrolysis reactor, where it is heated up to 90° C. within 50 minutes, after which hydrolysis begins. After that, the solution is heated within 25 minutes to a boiling point of 107° C. and boiled for 5.5 hours, the pressure in the hydrolysis reactor is kept at the range of 0.09-0.13 MPa. The vapors of hydrochloric acid evolved during this process are removed from the hydrolysis reactor through a heat exchanger irrigated with chilled water having a temperature of +7° C., where the condensation of hydrochloric acid with 35% HCl content takes place. The hydrochloric acid solution is continuously withdrawn from the refrigerator and collected in a separate collecting tank. Subsequently, hydrochloric acid can be use...
example 3
[0256]Prior to the reduction stage, the same procedure and sequence of actions are used as in example 2, except for the reduction stage, which is carried out in two stages and is described below.
[0257]According to the procedure described in example 1, the efficiency of the distribution of alloying additions in the crystal lattice of titanium oxide is checked after the stage of calcining the cake of oxides / hydroxides of titanium with uniformly precipitated oxides / hydroxides of alloying additives. The results of the content of Al and V in the residue differ from the results of the content of Al and V in the sample not subjected to dissolution in sulfuric acid by less than 5%, which indicates the dissolution of alloying additives in the crystal lattice of titanium oxide and a uniform distribution of alloying additives Al and V in the entire volume of titanium oxide particles (the results are shown in Table 1).
[0258]The first stage of reduction is carried out using metallic magnesium as...
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